Double catheter



APatented 8188181882 N, PETERS, Pnmumugnpm, wa-hingmm n. c,

' UNITED v STATESV lPATENT OFFICE.

EDWARD PFARRE, OF BROOKLYN, NEWIYO'RK.

Dou BLE CATH ETER.

SPECIFICATION forlung part of Letters Patent No. 256,590, dated April 18, 1882,

Application filed December 19, 1881.

To alt whom it may concern: Be it known that I, EDWARD PFARRE, ot' Brooklyn, in the county of Kings and State of New York, have invented an Improvement in double-current catheters7 and are made of silver or other metals or rigid material. They' consist either of two half-semicircular tubes soldered together, thus formin g a. circular outside, but divided in the middle by a metal partition or by a large tube containing a small tube within it, one ot the tubes leading the injection-Huid into the body,A the other allowing it to escape. In inexperienced hands these are dificu-lt'to introduce and painful to the patient, and they are expensive to manufacture.

An instrument for the purposes above stated that will be easy ofintroduction, soft, and give no pain, and at the same time be inexpensive, has long been desired.

I have experimented for some time, and have at last succeeded in producing an instrument that will be soft and easyof introduction, so that patients may be educated by their physicians to wash their bladder, stomach, 85e.,`

without pain and with ease.

In the drawings, Figure l is a longitudinal view of the two end portions in enlarged size. Fig. 2 is a cross-section, and Fig. 3 is a section at the point of the instrument in a slightly modified form.

I make this instrument of indiarubber or other elastic material, so as to be soft and pliable or elastic. It has the exterior shape and appearance of the usual soft-rubber catheter or stomach-tube. Its inside is constructed as follows: At one end is a piece of rubber tubing, c, large enough to allow the entrance of the nozzle of a syriugepipe. This tube continues for an inch or two in length, and then leads into a small duct, b, running the (Model.)

remainder ofthe length of the instrument and terminating in one or more small openings, d, near or at the point. This is vfor conveying the injecting-fluid.

The instrument is of uniform external diameter, or nearly so, and thelarger or exterior tube, a., is for the purpose of discharging the injected fluid. It is provided with an eye at e, into which the uid enters, and with another eye at f, where it iows out. The instrument may be used in this shape, or may be provided with fittings to carry the ejected tluid into a basin. The instrument may be made, as shown in Fig. 3, with the small injection-tube b terminating at the end of the instrument.

The manner in which I prefer to make this instrument is as follows:

. First. A strip of rubber is formed into a tube by being Vrolled over a mandrel and cemented. Let this be the large tube a.

Second. A small' mandrel is placed on top of the so-formed tube and a strip of rubber laid over it with the edges resting upon the rubber of the large tube, and these edges are cemented to the larger tube. The end portion, c, is cemented to or formed with the tubes a and b, andthe point or end of the instrument is formed by closing both tubesc and b.

Third. The large mandrel is removed and both the ends of the large tube are closed, the mandrel remaining in the small tube.

Fourth. The large tube and end tube are filled with water.

Fifth. The whole is put into a glass mold and sealed with rubber. Y

Sixth. The instrument is vulcanized in the usual manner.

Seventh. When vulcanized the instrument end for the reception of the syringe, and the remainder of the instrument divided into two tubes, one of which forms the injecting-duct running to the point; of the instrument, or nearly so, and the other the discharge-tube a, terminating at the back end within the main tube,:u1d having;` the oyes a and f, snbstan tinly :is sety foi-lh.

Signed by me this 15th day of December, A. D. 1881.

i I EDWARD PFARRE. Witnesses:

GEO. T. PINCKNEY, WILLIAM G. MOTT. 

